1/* 2 * ISO Media common code 3 * copyright (c) 2001 Fabrice Bellard 4 * copyright (c) 2002 Francois Revol <revol@free.fr> 5 * copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@free.fr> 6 * 7 * This file is part of FFmpeg. 8 * 9 * FFmpeg is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU Lesser General Public 11 * License as published by the Free Software Foundation; either 12 * version 2.1 of the License, or (at your option) any later version. 13 * 14 * FFmpeg is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public 20 * License along with FFmpeg; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 22 */ 23 24#ifndef AVFORMAT_ISOM_H 25#define AVFORMAT_ISOM_H 26 27#include "avio.h" 28#include "internal.h" 29#include "dv.h" 30 31/* isom.c */ 32extern const AVCodecTag ff_mp4_obj_type[]; 33extern const AVCodecTag ff_codec_movvideo_tags[]; 34extern const AVCodecTag ff_codec_movaudio_tags[]; 35extern const AVCodecTag ff_codec_movsubtitle_tags[]; 36 37int ff_mov_iso639_to_lang(const char lang[4], int mp4); 38int ff_mov_lang_to_iso639(unsigned code, char to[4]); 39 40/* the QuickTime file format is quite convoluted... 41 * it has lots of index tables, each indexing something in another one... 42 * Here we just use what is needed to read the chunks 43 */ 44 45typedef struct MOVStts { 46 int count; 47 int duration; 48} MOVStts; 49 50typedef struct MOVStsc { 51 int first; 52 int count; 53 int id; 54} MOVStsc; 55 56typedef struct MOVDref { 57 uint32_t type; 58 char *path; 59 char *dir; 60 char volume[28]; 61 char filename[64]; 62 int16_t nlvl_to, nlvl_from; 63} MOVDref; 64 65typedef struct MOVAtom { 66 uint32_t type; 67 int64_t size; /* total size (excluding the size and type fields) */ 68} MOVAtom; 69 70struct MOVParseTableEntry; 71 72typedef struct MOVFragment { 73 unsigned track_id; 74 uint64_t base_data_offset; 75 uint64_t moof_offset; 76 uint64_t implicit_offset; 77 unsigned stsd_id; 78 unsigned duration; 79 unsigned size; 80 unsigned flags; 81} MOVFragment; 82 83typedef struct MOVTrackExt { 84 unsigned track_id; 85 unsigned stsd_id; 86 unsigned duration; 87 unsigned size; 88 unsigned flags; 89} MOVTrackExt; 90 91typedef struct MOVSbgp { 92 unsigned int count; 93 unsigned int index; 94} MOVSbgp; 95 96typedef struct MOVStreamContext { 97 AVIOContext *pb; 98 int pb_is_copied; 99 int ffindex; ///< AVStream index 100 int next_chunk; 101 unsigned int chunk_count; 102 int64_t *chunk_offsets; 103 unsigned int stts_count; 104 MOVStts *stts_data; 105 unsigned int ctts_count; 106 MOVStts *ctts_data; 107 unsigned int stsc_count; 108 MOVStsc *stsc_data; 109 unsigned int stps_count; 110 unsigned *stps_data; ///< partial sync sample for mpeg-2 open gop 111 int ctts_index; 112 int ctts_sample; 113 unsigned int sample_size; ///< may contain value calculated from stsd or value from stsz atom 114 unsigned int stsz_sample_size; ///< always contains sample size from stsz atom 115 unsigned int sample_count; 116 int *sample_sizes; 117 int keyframe_absent; 118 unsigned int keyframe_count; 119 int *keyframes; 120 int time_scale; 121 int64_t empty_duration; ///< empty duration of the first edit list entry 122 int64_t start_time; ///< start time of the media 123 int64_t time_offset; ///< time offset of the edit list entries 124 int current_sample; 125 unsigned int bytes_per_frame; 126 unsigned int samples_per_frame; 127 int dv_audio_container; 128 int pseudo_stream_id; ///< -1 means demux all ids 129 int16_t audio_cid; ///< stsd audio compression id 130 unsigned drefs_count; 131 MOVDref *drefs; 132 int dref_id; 133 int timecode_track; 134 int wrong_dts; ///< dts are wrong due to huge ctts offset (iMovie files) 135 int width; ///< tkhd width 136 int height; ///< tkhd height 137 int dts_shift; ///< dts shift when ctts is negative 138 uint32_t palette[256]; 139 int has_palette; 140 int64_t data_size; 141 uint32_t tmcd_flags; ///< tmcd track flags 142 int64_t track_end; ///< used for dts generation in fragmented movie files 143 int start_pad; ///< amount of samples to skip due to enc-dec delay 144 unsigned int rap_group_count; 145 MOVSbgp *rap_group; 146 147 int nb_frames_for_fps; 148 int64_t duration_for_fps; 149 150 int32_t *display_matrix; 151} MOVStreamContext; 152 153typedef struct MOVContext { 154 AVClass *avclass; 155 AVFormatContext *fc; 156 int time_scale; 157 int64_t duration; ///< duration of the longest track 158 int found_moov; ///< 'moov' atom has been found 159 int found_mdat; ///< 'mdat' atom has been found 160 DVDemuxContext *dv_demux; 161 AVFormatContext *dv_fctx; 162 int isom; ///< 1 if file is ISO Media (mp4/3gp) 163 MOVFragment fragment; ///< current fragment in moof atom 164 MOVTrackExt *trex_data; 165 unsigned trex_count; 166 int itunes_metadata; ///< metadata are itunes style 167 int chapter_track; 168 int use_absolute_path; 169 int ignore_editlist; 170 int64_t next_root_atom; ///< offset of the next root atom 171 int *bitrates; ///< bitrates read before streams creation 172 int bitrates_count; 173 int moov_retry; 174} MOVContext; 175 176int ff_mp4_read_descr_len(AVIOContext *pb); 177int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag); 178int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb); 179void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id); 180 181#define MP4ODescrTag 0x01 182#define MP4IODescrTag 0x02 183#define MP4ESDescrTag 0x03 184#define MP4DecConfigDescrTag 0x04 185#define MP4DecSpecificDescrTag 0x05 186#define MP4SLDescrTag 0x06 187 188#define MOV_TFHD_BASE_DATA_OFFSET 0x01 189#define MOV_TFHD_STSD_ID 0x02 190#define MOV_TFHD_DEFAULT_DURATION 0x08 191#define MOV_TFHD_DEFAULT_SIZE 0x10 192#define MOV_TFHD_DEFAULT_FLAGS 0x20 193#define MOV_TFHD_DURATION_IS_EMPTY 0x010000 194#define MOV_TFHD_DEFAULT_BASE_IS_MOOF 0x020000 195 196#define MOV_TRUN_DATA_OFFSET 0x01 197#define MOV_TRUN_FIRST_SAMPLE_FLAGS 0x04 198#define MOV_TRUN_SAMPLE_DURATION 0x100 199#define MOV_TRUN_SAMPLE_SIZE 0x200 200#define MOV_TRUN_SAMPLE_FLAGS 0x400 201#define MOV_TRUN_SAMPLE_CTS 0x800 202 203#define MOV_FRAG_SAMPLE_FLAG_DEGRADATION_PRIORITY_MASK 0x0000ffff 204#define MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC 0x00010000 205#define MOV_FRAG_SAMPLE_FLAG_PADDING_MASK 0x000e0000 206#define MOV_FRAG_SAMPLE_FLAG_REDUNDANCY_MASK 0x00300000 207#define MOV_FRAG_SAMPLE_FLAG_DEPENDED_MASK 0x00c00000 208#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_MASK 0x03000000 209 210#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO 0x02000000 211#define MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES 0x01000000 212 213#define MOV_TKHD_FLAG_ENABLED 0x0001 214#define MOV_TKHD_FLAG_IN_MOVIE 0x0002 215#define MOV_TKHD_FLAG_IN_PREVIEW 0x0004 216#define MOV_TKHD_FLAG_IN_POSTER 0x0008 217 218#define TAG_IS_AVCI(tag) \ 219 ((tag) == MKTAG('a', 'i', '5', 'p') || \ 220 (tag) == MKTAG('a', 'i', '5', 'q') || \ 221 (tag) == MKTAG('a', 'i', '5', '2') || \ 222 (tag) == MKTAG('a', 'i', '5', '3') || \ 223 (tag) == MKTAG('a', 'i', '5', '5') || \ 224 (tag) == MKTAG('a', 'i', '5', '6') || \ 225 (tag) == MKTAG('a', 'i', '1', 'p') || \ 226 (tag) == MKTAG('a', 'i', '1', 'q') || \ 227 (tag) == MKTAG('a', 'i', '1', '2') || \ 228 (tag) == MKTAG('a', 'i', '1', '3') || \ 229 (tag) == MKTAG('a', 'i', '1', '5') || \ 230 (tag) == MKTAG('a', 'i', '1', '6') || \ 231 (tag) == MKTAG('A', 'V', 'i', 'n')) 232 233 234int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom); 235enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags); 236 237int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries); 238void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout); 239 240#endif /* AVFORMAT_ISOM_H */ 241